Firebug is areally cool extension to Firefox that one of our designers showed meyesterday. It inspects the current page and displays all sorts of greatinfo about it. That's okay and there have been other scriptlets that dosimilar things. Where it goes beyond others is that you can actuallyedit anything and have it show up on the page, whether you own the pageor not. Obviously, it is not saved, but it's a great way to experimentas you are building your pages. In the picture below...
(we've moved - new Inside Lotus blog)